silberbeeg



(No Model.) q 2 Sheets-Sheet 1. N. SILBERBERG.

AUTOMATIC GLOGK WINDING DEVICE.

I No. 297,020. Patented Apr. 15,1884.

Z V v Jaye/ZZZ); W Z'ZIMJJap 73 K Z ,juz 'M% a m m fl/Z'Zzwq/Ji N4PETERS. Phnkwumumwor. \Valhinglnll. n. C.

Unirsn Starts Farrier rricn.

NATHAN SILBERBERG, OF YASSY, ROUMANIA.

AUTOMATIC CLOCK-WINDING DEVICE.

SPECIFICATION forming part of Letters Patent No. 297,020, dated April15, 1884-.

Application filed July 3, 1883. (N0 model.) Patented in Germany October25, 1882; in France October 26, 1882, No. 151,758; in England November28, 1882, No. 5,661, and in Austria-Hungary February 24, 1883, No.35,814 and No. 7,514.

To aZZ whom it may concern:

Be it known that I, NATHAN SILBERBERG, a subject of the King ofRoumania, and a resident'of Yassy, in the Kingdom of Roumania, haveinvented a certain new and useful Improvement in AutomaticOlock-WVinding Devices, to be called Perpetual Motor for Clockork, ofwhich the following is a specification.

The object of my invention is to provide a new and improvedself-operating device for winding up clock-works.

The invention consists in a series of ineta-lli rods or bars connectedin such a manner that the variations or changes in the length of themetal bars caused by changes in the tempera ture can be utilized forproducing the power necessary for winding up the clock-works.

Reference is to be had to the accompanying drawings, forming part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure I is a view of the back of a clock, showing the back plate of thecasingremoved. Fig. 11 is a perspective view of the chain of metal bars.Fig. III is a side view of the clock. Fig. IV is a face View of theweight, chain, and toothed wheels for winding up the clock. Fig. V is aface view of the ratchet mechanism for transmitting the motion obtainedby the lengthening and shortening of the rods.

The metal chain, which is the essential feature of my invention, isformed of a number of metal bars or rods, y, preferably of zinc, theends of which are connected by metal beams or levers f, of which one setis pivoted centrally at the top and the other centrally at the bottom ofthe clock-casing. levers f form a chain,the first member of which,consisting of a bar, 3 is fixed at its end a to the clock-casing, theother end, a", thereof being pivoted to the end of the first lever, f,of the top row of levers. To the other end, c of this first lever thesecond metal bar, y, is pivoted, which reaches down on one side of theclock-case to the end a of the first lever f of the bottom rod. To theother end, c of the said lever f is pivoted thethirdbar, "1 passingupward on the other side of the clock, and pivoted to the end a of thesecond lever, f, of the The metal bars y and the upper row, and so on.Any desired number of bars or rods 1 can be connected by means of thelevers f in the manner described. At any change oftemperature the lengthof movement of the free end of the chain will be equal to the totallength of the expansion or contraction of the metal bars 1 The last bar,3/, of the said chain is connected to a suitable mechanism, by meansofwhich the variationsinthe lengths of the chain can be utilized for thepurpose of winding up the clock. Severaldifi'erent devices can be usedfor this purpose, one of which I have shown in Figs. IV and'V. The bar'yis fastened to a chain c, which is fastened at the point e to thecircumference of a wheel, I), keyed upon the shaft f, on which is alsokeyed a disk, cl, to which a chain or rope, j, is fastened at apoint,c,which is diametrically opposite the point e. To the lower end of therope or chain j a weight, g, is attached. A ratchet-wheel, i, is keyedon the shaft f, and a series of pawls, Z, are pressed against the teethof the ratchet-wheel by springs on. The said pawls and their springs areheld on a ratchet-wheel, k, mounted on a sleeve loose on the shaft f,against which ratchet-wheel 7c pawls Z are pressed by springs in.

The above-described wheels are contai ned in a casing, 00, within thespace surroundedby the chain. On the sleeve of the wheel is a wheel, a,is mounted, over which an endlesschain, A, passes, which also passesover wheels (1 andr, and over pulleys s and it, from which weights A andB, respectively, are suspended. chain is connected with the clock-work.

The operation of the winding mechanism is as follows: When by theincrease of temperature the length of the chain of bars y and the leversf increases the end of the bar 3 moves upward and thus slackens thechain c, which permits the weight g to descend, therebyturning the shaftf of the wheel 2' in the direction of the arrow r. The pawls Z, nowacting as a clutclncause the ratchet-wheel Into rotate in the samedirection, and as the said wheel is is connected by its sleeve with thewheel a, the wheel a will revolve in the same direction, and will windup the chain A, thereby raising the weight A and winding up theclockwork. When the temperature decreases, the end ofthe The bar 3/moves downward, thereby lilting the I weight and turning the shaft ofthe ratchetwheel till the opposite direction to that in which it wasturned before; but as the pawlsl permit the wheel 1 to rotate freely,and the pawls Z check the movement of the ratchetwheel 7., itis olea rthat an y expansion or lengtheningol' the chain or of the bars andlevers will be utilized for winding up the clock; but a decrease oftemperature and consequent contract-ion of the said chain cannot causean unwinding of the clock.

I do notlimit myself to the abovedescribed arrangement of theratchet-wheels, pawls, and connection between them and the bar '1/, asmany other devices for utilizingthe said automatic movement of the saidbar 3 might be employed. It is also evident that without departing fromthe substance of this invention the contraction instead of thelengthening of the chain might be utilized for winding up the clock.

Instead of pivoting the level-sf upon knifeedges, as shown in thedrawings, other suitable methods of pivoting the same may be used.

Any suitable step may be arranged for preventing overwinding. Theconstruction shown in Fig. i has been found to give good results. Itconsists of a pawl, T, against which the block or frame 8 of the weightAstrikes when the clock is completely wound up, whereupon the pawl Tengages the teeth of the chainwheel 12-, and thus prevents any furtherwind ing up of the clock by checking thedownward movement of the weightg.

The number and length of the bars 1 will dc pend on the length of timethe clock is to run and on the dimensions of the same.

I am aware that the expansion and contraction of a metallic rod, bar, orstrip have been used to operate the damper ot'a stove, or to operate alever connected with the hand of a dial; but

hat I do claim as new and of my invention is- 1. In a clock, thecombination, with ametal chain formed of a series of bars or rods connected by lovers, of the weighty, the chain j, the disks?) (1 on theshaft f, the rope "U, the ratchet-wheels 1? k, the pawls Z1, and the springs in m, which ratchet-wheel k is connected with the chain forwinding up the weight or spring of the clock, substantially as hereinshown and described, and for the purpose set forth.

2. In a clock, the combination, with a metal chain formed of a series ofbars or rods connected by lovers, of devices for winding up the weightsor springs of a clock, and ot a safetycateh for automatically preventingthe further winding of the spring or weight at the proper time, for thepurpose of preventing overwind ing of the clock-work, substantially asherein shown and described.

In testimony whereof Ihave affixed my naturein presence of twowitnesses.

NATHAN SILBERBERG.

\Vitnesscs:

1*. ED. MEYER, Tn. KnoonimL.

